I really have tried to the point of desperation! Can anyone help by giving me a HINT to the following. NOT the answer. The theme is nautical
Taste wines not showing in the middle vessel. (4)
the course sailors follow to improve their wellbeing (5,5)
Well-organised charmer all in tune around most of the oceans (5,9)
Look at the middle of each of four words in the clue The first word is a famous course followed by another word for sailors The charmer is an anagram giving a name of famous person.